DACP & ADC

The Digital line is an extension of Swan Song’s power supply and analog circuitry capabilities.  Current DACs and ADCs are at the point where the most gains can be found in the areas of execution, power supplies, and analog amplification/buffering.  Products include:

  • 192kHz 24 bit Digital to Analog Converter with Preamp
  • 192kHz 24 bit Analog to Digital Converter
DACP with 4 sources, volume and headphone jack
DAC with 2 coax, 2 192kHz optical in, and fixed and variable outputs
DACP with 2 coax, 2 192kHz optical in, and fixed and variable outputs

Digital to Analog Converter Preamp - $2600 with power supply

The Digital to Analog Converter Preamplifier combines a 192kHz DAC, Preamplifier, and dedicated headphone amplifier.  The DACP has four 192kHz inputs, fixed and variable outputs, a volume control, and a separate headphone amplifier.  

The DACP design focuses on keeping digital noise out of the analog signal.  Clean separate power "supplies", power up on demand logic, only the best components, and years of producing low noise phono preamps combine to create an exceptionally clean non-“metallic” DACP.

Headphone and speaker based listening differ in the amount of space available to develop full stereo imaging.  This “lack of space” led to the development of crossfeed to adjust the left right output signals in order to create a “stereo center channel” from headphones.  To aid with headphone "stereo imaging", the DACP contains an adjustable crossfeed circuit.  Turn the “xfeed” knob to the left and pure stereo sound is sent out the headphone jack.  Turn the “xfeed” knob to the right and the crossfeed circuitry is engaged.  The amount and level of crossfeed is determined by the amount of “xfeed” knob rotation to the right.

Whether used as a preamp or as a headphone amp, the analog focused DACP blurs the lines between digital and analog.

ADC with 48, 96, and 192kHz select and input attenuator
ADC with 48, 96, and 192kHz select and input attenuator

Analog to Digital Converter

ADC is the “other side of the coin”.  The ADC begins with the TI PCM1861 ADC and Cirrus 8406 output chip.  Variable clocking along with Swan Song’s Phono and Power supply technology combine to produce an ADC capable of capturing all the nuances of an analog recording.  Adding in the convenience of a volume control with a peak level indicator ensures that conversion is done without clipping.

ADC with analog pass through, coax and 192kHz optical out
ADC with analog pass through, coax and 192kHz optical out

The ADC and DACP combination are so clean that combined with the in house Wein Bridge sine wave generator they only increase the distortion from .0025% to .006%

Both products use the same European natural aluminum anodized chassis as in the phono product line.  Do not let the small chassis fool you into thinking less of this little power house.  It has successfully transmitted data via fiber optic at a distance of 50 feet.

Here are two sample clips from the SE Phono and the ADC using a Sumiko Pearl MM cartridge.

Sample1.wav

Sample2.wav

Click here to access documentation videos on youtube

Tech

1 kHz 'Wien Bridge' test signal 0.0025% distortion used for testing.  This sets the base level noise floor at -96dB. +6dB 2 kHz and +3 dB 3 kHz harmonics.
1 kHz 'Wien Bridge' test signal 0.0025% distortion used for testing. This sets the base level noise floor at -96dB. +6dB 2 kHz and +3 dB 3 kHz harmonics.
DAC output fed by ADC using the 1 kHz test tone
DACP output fed by ADC using the 1 kHz test tone
DAC output fed by ADC using the 1 kHz test tone. +6dB 2 kHz and +3 dB 3 kHz harmonics.
DACP output fed by ADC using the 1 kHz test tone. +6dB 2 kHz and +3 dB 3 kHz harmonics.

DACP

  • Cirrus 8416 and TI PCM5142
  • Sample rates up to 192 kHz
  • Two 192 kHz transformer coupled coax inputs
  • Two 192 kHz optical inputs
  • Internal gain adjust settings
  • Internal De-emphasis setting
  • Fixed, variable, and headphone outputs
  • Distortion with ADC 0.006%
  • 2.5”h 4”w 8”d
  • Comes with a Amarra license

ADC

  • Cirrus 8406 and TI PCM1861
  • Selectable 48, 96, and 192 kHz sampling rates
  • Internal setting for IS2, Left, Right 16/24 bits
  • Internal setting for copyright protection
  • Internal setting for emphasis
  • Attenuation and level indicator
  • One 192 kHz transformer coupled coax output
  • One 192 kHz optical output
  • RCA pass-through analog inputs
  • 2.5”h 4”w 8”d

Actual noise floor will vary based on environment and connecting components.